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273 B

#!/bin/bash
ssh-keygen -t rsa
network=$(ifconfig | grep 255.255.0.0 | awk '{print $2}' | cut -d '.' -f1-3)
network="$network.*"
hosts=$(nmap -sP $network | grep worker | awk '{print $6}' | cut -d ')' -f1 | cut -d '(' -f2)
for ip in $hosts
do
ssh-copy-id docker@$ip
done